How to define x-axis values for a line chart with continuous scale

[morenoju]

Hi folks,

Whenever I make a line chart with continuous scale to display a measure over time of the day, someone always asks for better x-axis reference values (for example 06:00, 12:00 and 18:00).

I find the request very reasonable to and it sounds like it must be a very easy change, however I haven't found the way to do it yet.

Do you know how I can control the numbers displayed on the x-axis?

Thanks